INFLUENCE OF POCKET GOPHER MOUNDS ON A TEXAS COASTAL PRAIRIE
INFLUENCE OF POCKET GOPHER MOUNDS ON A TEXAS COASTAL PRAIRIE
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DOI：
10.1007/bf00378561
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发表时间：
1985-01-01
期刊：
影响因子：
2.7
通讯作者：
WILLIAMS, LR
中科院分区：
文献类型：
--
作者：
SPENCER, SR;CAMERON, GN;WILLIAMS, LR
在美国德克萨斯州南部的沿海草原上，研究了袋地鼠（G. attwateri）筑丘活动对植物群落组成和土壤养分浓度的影响。口袋地鼠沉积了大量的土壤，这些土壤的养分含量低于随机收集的样本。地上部植物生物量在土堆周围大于随机样地，这主要是由于在同一区域上，与随机样地相比，在土堆周围的燃烧面积增加了。口袋地鼠可能会把它们的活动（因此，土丘）集中在燃烧区域具有较高的双科植物生物量的地区，因为它们更喜欢多年生双科植物作为食物，或者土丘的存在可能改善了火灾对双科植物的明显负面影响。
Effects of pocket gopher (G. attwateri) mound-building activity of plant community composition and soil nutrient concentrations were investigated in south Texas on both burned and unburned coastal prairie sites. Pocket gophers deposited large amounts of soil which were lower in nutrient content than randomly-collected samples. Above-ground plant biomass was greater around mounds than in random samples mainly because of increased dicots around mounds on the burned area when compared with random samples on the same area. Pocket gophers may have concentrated their activities (and therefore, mounds) in areas with higher dicot biomass on the burned area since they prefer perennial dicots as food, or the presence of mounds may have ameliorated the apparent negative effect of fire on dicots.